Film pack



Novn 16,1926. I

K. BERGMANN FILM PACK Filed Jan. 25, 1925 2 Sheets-Sheet l at N NT E mf a lf Qin. .1 U 1%. Mw .am MN 5E Wa L@ f Lm MM.,

Nav. 16,1926. 1,607,044

K. BERGMANN FILM PACK File@ Jan. 25,- 192s 2 sheets-sheet 2 iiatented Nov. 15, i926.

FILM PACK.

Application filed January 25, 1323, Serial No. 614,342, and in Germany January 2S, 1922.

My invention relates to improvements in film packs, and the object of the improvements is to provide a nlm pack in which the casing enclosing the films is not de stroyed when using the films, so that the said casing can be refilled.- With this object in view my invention consists in constructing the casing enclosing thefilms from a front part formed with an exposure opening and a removable rear part or cover forming with the front parta slot for the passage of the operating ends or tabs of the iilm backing sheets therethrough and constructed so as to exclude light from the interior 'of the casing.

In order that my invention be more clearly understood several examples embodying the same have been shown in the accompanying drawings in which,

Fig. 1, is an elevation showing.;` the front part of the casing provided with an exposure opening,

Fig. 2, is a cross-section taken on the line 2-2 of Fig. 1,

Fig. 3, is a plan view of Fig. 1,

Fig. 4, is an elevation showing the film tray,

Fig. 5, is a longitudinal section taken on the line 5 5 of Fig. 4,

Fig. 6, is a section taken on of Fig. 4,

Fig. 7, is an elevation showing the cover or rear part of the casing,

Fig. 8, is a longitudinal section taken on the line 88 of Fig. 7,

Figl 9, is a section taken on the line 9 9 of Fig. 7,

Fig. 10, is a vertical section showing the parts of the casing assembled and a iilm pack enclosed therein,

Fig. 11, is a horizontal section taken on the line 11-11 of Fig. 10,

Fig. 12, is an elevation'showing a modification of the rear part or cover,

Fig. 13, is a longitudinal section taken on the line 13-13 of Fig. 12, and

Fig. 14, is a cross-section taken on the line 14-14 of Fig. 12.

In the example shown in Figs. 1 to 11, my improved film casing comprises a front part 12, a rear part or cover 23, and a tray 18, which parts are each made from a single piece of sheet metal. The front part` 12 consists of a rectangular plate 13 having a rectangular eXA osure opening 13 made therein and afapted to support the the un@ 6 6 pack. At the margins the plate 13 is bent rearwardly into side walls 35, 36, 37, and 38 ruiming all around the frame. The upper narrow side wall 35 is bent inwardly at a right angle so as to provide a fiange 14, 15 parallel to the plate 13, the median portion 14 of the flange receding relatively to the marginal portions 15, and having a strip of light excluding material 16 glued thereto. The longitudinal side walls 36 and 37 are bent Vinwardly at right angles and along a part of their lengths to provide narrow flanges or guide members 17 parallel to the plate 13. At the corners the side walls 36 and 37 are provided with corner flaps 36 bent over the side walls 3.5 and 33 and providing light excluding corner joints.

The film tray 18 consists of a rectangular plate having the upper narrow margin 19 and the longitudinal margins 19 bent forwardly so as to provide a flat casing adapted to have the films embedded therein. The lower margin is rolled into a rounded portion 2O providing a guide for the lms being pulled over the same. From the plate 18 spring tongues 21 are struck out and bent forward y and into the casing, which tongues are adapted to press the follower part 39 and the hlm pack forwardly and towards the opening 13, andA at `the upper corners tongues 22 are bent outwardly .for clamping the tray in position between the front part 12 and its cover 23. l

The rear part or cover 23 consists of a rectangular plate of sheet metal having its longitudinal margins bent rearwardly and inwardly to provide U-shaped guides or pockets 24 and formed into side walls 25.

The lower narrow margin is bent forwardly into a side wall 26 and a fiange 27 to provide a pocket. The upper narrow margin projecting beyond the side walls and the guide ways 24 is in the form of a tongue 2S covered with a strip 29 of light excluding material such as velvet.

The parts are yassembled vinto a film'. pack in the manner shown in Figs. 10 and 11. At first the follower part 39 and the film pack are placed into ,the tray 13 with the paper tabs 30 bent aroundl the rolled margin 2O and the sensitized* surface `directed'ou .vardly, andthe trayv is insertedv into the front Vpart 13 from the bottom end thereof and below the flanges 17 and with the films located at the er nf the espesura opening' 13"', until Vto 11.

the lateralguide members 24 are constructed the part 18 is covered at its longitudinal margins by the flanges 17. Now the outer lilm is supported with its margins on the plate 13 and it is pressed in contact therewith by they tongues 22 bearing on the flange portions 15. The paper tabs 30 are placed on the strip of velvet 16 provided on the flange 14. Finally the cover is pushed into the member 13, the side walls 25 enn closing the side walls 12,and the flanges 1? of the frame 13 engaging in the guides or pockets 9A ot the cover The tongue 2S is passed below the flange portions 15 and between the same and the tongues 22 o't the tray 18, and the velvet strip 29 Clamps the paper tabs 30 on the velvet strip 1G, said strip excluding the light from the inner parts ot the casing. At the bottom end the pocket 2G, 27 encloses the bottompart of the rontinember 13 Aand excludes the light Yfrom the bottom part ot the lihn pack.

For removing the exposed lilms 'from the casing the cover 28 and the tray 18 are removed in the reverse order. lt will be understood that thereby none ot the parts of the kcasing are injured, so that the saine ea,VHN ing can be refilled and used again. Y

In the modification shown in Figs. 12 to 14 the construction of the front part 'formed with-the exposure opening and the tray may be and preferably is substantially the same as that described' with ret'erence to Figs. 1 However, in the rear part or cover in a different way. As shown in Figs. 12 to 111, the portions ot the sheet metal from which the side walls 25 are formed are bent inwardly and towards the body of the Cover 23 at 40, and the portions 40 are formed with/flaps 41 extending from a part away from the upper margin of the body 23 to a part away from the lower margin and bent into a U-shaped guide or pocket 24 disposed in a depressed portion l2 extending from a part vaway trom the upper margin of the body 23 to a part away from the lower margin oi' the said body.

The parts are assembled substantially in the saine way as has been described with reference to Figs. 1 to 11.

In some ofthe vclaims I describe the 'liront part 12 and the rear part Q3 as being looselyi connected with each other in order to indicate that the saidparts are capable oi being disconnected trom each other without breaking any rigid or permanent joint, and

of being connected with each other by being merely yput together without making a Vfixed joint. This feature is import 4it because it permits the casing to be relilled and i'f-.sed over and over again atter the iilins of one pack have been. exposed and removed for being developed.

lVhile in describing the' invention reference has been made to particular examples embodying the same I wish it to be understood that my invention is not limited to the constructions shown in the drawings, and that various changes may be made in the general arrangement ot the apparatus and the construction oic its parts without departing from the inventionI I claim:

1. A casing for photographic .tilin packs, comprising two parts ot sheet metal in light excluding engagement with. each other and one having an opening for the exposure of the films, one or" said parts being provided at opposite sides with elongated guide pockets claw-like in section and the other aart having flanges corresponding to said pockets and adapted for sliding engagement therewith, and a partition within said casing dividing the san/1e vinto eonununicating Chambers for unexposed and exposed tilms, said casing having a passage at one end for the operation oit the lilms theretl rough,

,2. A casing for photographic film packs, eomprisin'gvtwo parts of sheet metal each having a rectangular plate and side walls in light excluding engagement with eaeh other and one having an openingy in its plate for the exposure ot the lilms, said casing having a passage at one end for the operation of the lihns therethrough, a pair of lopposite side walls of one part being bent inwardly and towards its rectangular plate intothe Yform of guide pockets and the corresponding side walls ot the other part being bent into the form of slides corresponding to said vguide pockets, and av partition within said 'casing dividing the same into vcoinmunieating chambers for unexposed and exposed'lilms.

3. In a casing for tilm packs, the'con'ibination, with a front part having a rectangular plate formed with an Aeniposure opening, sidewalls runningl all around rectangular plate, inwardly projecting flanges provided at a pair of opposite side walls, and

a flange projecting 'from azt-hird side wall inwardly and Covered with` light excluding material, ot' a cover for said rontvpart haw ing a closed rectai'igu'lar plate, sidewalls at three of its sides, guide pockets provided at a pair offopposite'margins Ot: the rectanguiark platey of said cover, and cooperating with the flangesl ofv said front' part and covered with light excluding material at its fourth side in Iposition forfproviding a light excluding passage with the light excluding material Y.applied tosaid iiange of the front part, and filni'holding means 'within said front part and cover. n

1n testimony'whereof I hereunto atlix my signature. s. e

KARL 'BERGMANN 

